09/08/2026 updated
100 % available
Senior AI Full Stack Engineer | Python, FastAPI, React & Generative AI
Gdansk, Poland
Only remote
Poznan University of Technology - Bachelor of Science in Computer ScienceAbout me
Senior AI Full Stack Engineer with 8+ years building scalable SaaS, AI applications, and automation solutions using Python, Django, FastAPI, React, Next.js, TypeScript, PostgreSQL, AWS, Docker, OpenAI APIs, and LLMs.
SupabaseJavaScriptPHPArtificial IntelligenceAmazon Web ServicesHTML5Cascading Style Sheets (CSS)Software as a ServiceDjangoPython (Programming Language)LaravelPostgreSQLMongoDBMySQLNatural Language Processing
AI & Generative AI Integration
Expertise in Generative AI, Large Language Models, OpenAI APIs, Natural Language Processing, Retrieval Augmented Generation, AI Assistants, Document Processing, Intelligent Search, and Workflow Automation for building AI-powered SaaS platforms and business automation solutions.
Backend Engineering with Python
Deep proficiency in Python, Django, FastAPI, Flask, Node.js, Laravel, RESTful APIs, GraphQL, and Microservices for developing scalable, secure backend services and APIs across complex production environments.
Frontend Engineering
Strong command of React, Next.js, TypeScript, JavaScript, Angular, React Native, HTML5, and CSS3 for building responsive, SEO-friendly, and modern user interfaces integrated with backend services.
Data & Storage Management
Solid experience with PostgreSQL, MySQL, MongoDB, Redis, Supabase, Firebase, and SQL for structuring scalable database architectures, optimizing schemas, and managing cloud-based data solutions.
Cloud & DevOps Delivery
Hands-on experience with Amazon Web Services, Docker, Kubernetes, CI/CD pipelines, Git, Cloud Deployment, and Automated Testing for deploying and maintaining production-grade applications.
SaaS Architecture & Multi-Tenancy
Architecture of multi-tenant SaaS platforms covering authentication, authorization, subscription management, payment integrations, and application security following best practices.
API Design & Third-Party Integrations
Implementation of RESTful and GraphQL APIs, payment gateways, authentication providers, notification services, and external business platform integrations into production workflows.
Performance Optimization & Application Security
Application of caching strategies, asynchronous processing, background jobs, database optimization, code refactoring, and security practices to improve reliability, scalability, and performance.
Experience
Professional experience5 - 10 years
Freelancer since2019
Languages
EnglishFluent
Project history
- Engineered AI-powered SaaS platforms with Python, FastAPI, Django, React, Next.js, and TypeScript.
- Integrated OpenAI APIs and LLM-based capabilities for AI assistants, document processing, intelligent search, and workflow automation.
- Architected scalable multi-tenant SaaS patterns covering authentication, authorization, subscription management, and payment integrations.
- Implemented RESTful and GraphQL APIs plus third-party service integrations.
- Deployed production applications on AWS with Docker, Kubernetes, and CI/CD pipelines.
- Developed scalable web applications and SaaS products with Python, Django, Flask, FastAPI, React, Next.js, and TypeScript.
- Delivered secure backend services, APIs, authentication systems, dashboards, and business management platforms.
- Optimized database schemas and query patterns across PostgreSQL, MySQL, MongoDB, and Redis.
- Containerized applications with Docker and supported cloud deployment and CI/CD automation.
- Delivered full-stack web applications for startups and growing businesses with Python, Django, Flask, React, Node.js, and Next.js.
- Engineered RESTful APIs, database systems, administrative dashboards, customer portals, and internal business applications.
- Structured scalable database architectures using PostgreSQL, MySQL, MongoDB, Firebase, and Redis.
- Maintained reliable development and production workflows with Git, Docker, CI/CD, and cloud deployment practices.